| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20251018-vkms-all-config-v1-8-a7760755d92d@bootlin.com>
Date: Sat, 18 Oct 2025 04:01:08 +0200
From: Louis Chauvet <louis.chauvet@...tlin.com>
To: Haneen Mohammed <hamohammed.sa@...il.com>,
Simona Vetter <simona@...ll.ch>, Melissa Wen <melissa.srw@...il.com>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, jose.exposito89@...il.com,
Jonathan Corbet <corbet@....net>
Cc: victoria@...tem76.com, sebastian.wick@...hat.com, victoria@...tem76.com,
airlied@...il.com, thomas.petazzoni@...tlin.com,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
linux-doc@...r.kernel.org, Louis Chauvet <louis.chauvet@...tlin.com>
Subject: [PATCH 08/22] drm/vkms: Introduce configfs for plane color range
To allows the userspace to test many hardware configuration, introduce a
new interface to configure the available color ranges per planes. VKMS
supports multiple color ranges, so the userspace can choose any
combination.
The supported color ranges are configured by writing a color range bitmask
to the file `supported_color_ranges` and the default color range is
chosen by writing a color encoding bitmask to `default_color_range`.
Signed-off-by: Louis Chauvet <louis.chauvet@...tlin.com>
---
Documentation/gpu/vkms.rst | 7 ++-
drivers/gpu/drm/vkms/vkms_configfs.c | 93 ++++++++++++++++++++++++++++++++++++
2 files changed, 99 insertions(+), 1 deletion(-)
diff --git a/Documentation/gpu/vkms.rst b/Documentation/gpu/vkms.rst
index 4ff75b53a386..979f8a545498 100644
--- a/Documentation/gpu/vkms.rst
+++ b/Documentation/gpu/vkms.rst
@@ -87,7 +87,7 @@ Start by creating one or more planes::
sudo mkdir /config/vkms/my-vkms/planes/plane0
-Planes have 5 configurable attribute:
+Planes have 7 configurable attribute:
- type: Plane type: 0 overlay, 1 primary, 2 cursor (same values as those
exposed by the "type" property of a plane)
@@ -101,6 +101,11 @@ Planes have 5 configurable attribute:
by the COLOR_ENCODING property of a plane)
- default_color_encoding: Default color encoding presented to the userspace, same
values as supported_color_encoding
+- supported_color_range: Available color range for a plane, as a bitmask:
+ 0x1 DRM_COLOR_YCBCR_LIMITED_RANGE, 0x2 DRM_COLOR_YCBCR_FULL_RANGE (same values as
+ those exposed by the COLOR_RANGE property of a plane)
+- default_color_range: Default color range presented to the userspace, same
+ values as supported_color_range
Continue by creating one or more CRTCs::
diff --git a/drivers/gpu/drm/vkms/vkms_configfs.c b/drivers/gpu/drm/vkms/vkms_configfs.c
index a4e0e054cf2d..0b280c73b0cc 100644
--- a/drivers/gpu/drm/vkms/vkms_configfs.c
+++ b/drivers/gpu/drm/vkms/vkms_configfs.c
@@ -412,6 +412,95 @@ static ssize_t plane_default_rotation_store(struct config_item *item,
return count;
}
+static ssize_t plane_supported_color_range_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_plane *plane;
+ unsigned int supported_color_range;
+
+ plane = plane_item_to_vkms_configfs_plane(item);
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ supported_color_range = vkms_config_plane_get_supported_color_range(plane->config);
+ }
+
+ return sprintf(page, "%u", supported_color_range);
+}
+
+static ssize_t plane_supported_color_range_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_configfs_plane *plane = plane_item_to_vkms_configfs_plane(item);
+ int ret, val = 0;
+
+ ret = kstrtouint(page, 10, &val);
+ if (ret)
+ return ret;
+
+ /* Should be a supported value */
+ if (val & ~(BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE)))
+ return -EINVAL;
+ /* Should at least provide one color range */
+ if ((val & (BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE))) == 0)
+ return -EINVAL;
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ /* Ensures that the default rotation is included in supported rotation */
+ if (plane->dev->enabled ||
+ (val & vkms_config_plane_get_default_color_range(plane->config)) !=
+ vkms_config_plane_get_default_color_range(plane->config))
+ return -EINVAL;
+ vkms_config_plane_set_supported_color_range(plane->config, val);
+ }
+
+ return count;
+}
+
+static ssize_t plane_default_color_range_show(struct config_item *item, char *page)
+{
+ struct vkms_configfs_plane *plane;
+ unsigned int default_color_range;
+
+ plane = plane_item_to_vkms_configfs_plane(item);
+
+ scoped_guard(mutex, &plane->dev->lock)
+ default_color_range = vkms_config_plane_get_default_color_range(plane->config);
+
+ return sprintf(page, "%u", default_color_range);
+}
+
+static ssize_t plane_default_color_range_store(struct config_item *item,
+ const char *page, size_t count)
+{
+ struct vkms_configfs_plane *plane = plane_item_to_vkms_configfs_plane(item);
+ int ret, val = 0;
+
+ ret = kstrtouint(page, 10, &val);
+ if (ret)
+ return ret;
+
+ /* Should be a supported value */
+ if (val & ~(BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE)))
+ return -EINVAL;
+ /* Should at least provide one color range */
+ if ((val & (BIT(DRM_COLOR_YCBCR_LIMITED_RANGE) |
+ BIT(DRM_COLOR_YCBCR_FULL_RANGE))) == 0)
+ return -EINVAL;
+
+ scoped_guard(mutex, &plane->dev->lock) {
+ /* Ensures that the default rotation is included in supported rotation */
+ if (plane->dev->enabled ||
+ (val & vkms_config_plane_get_supported_color_range(plane->config)) !=
+ val)
+ return -EINVAL;
+ vkms_config_plane_set_default_color_range(plane->config, val);
+ }
+
+ return count;
+}
+
static ssize_t plane_supported_color_encoding_show(struct config_item *item, char *page)
{
struct vkms_configfs_plane *plane;
@@ -513,6 +602,8 @@ static ssize_t plane_default_color_encoding_store(struct config_item *item,
CONFIGFS_ATTR(plane_, type);
CONFIGFS_ATTR(plane_, supported_rotations);
CONFIGFS_ATTR(plane_, default_rotation);
+CONFIGFS_ATTR(plane_, supported_color_range);
+CONFIGFS_ATTR(plane_, default_color_range);
CONFIGFS_ATTR(plane_, supported_color_encoding);
CONFIGFS_ATTR(plane_, default_color_encoding);
@@ -520,6 +611,8 @@ static struct configfs_attribute *plane_item_attrs[] = {
&plane_attr_type,
&plane_attr_supported_rotations,
&plane_attr_default_rotation,
+ &plane_attr_supported_color_range,
+ &plane_attr_default_color_range,
&plane_attr_supported_color_encoding,
&plane_attr_default_color_encoding,
NULL,
--
2.51.0
Powered by blists - more mailing lists